Working Principle and Technical Features of Combined Flow Closed Cooling Towers

The process medium circulates fully inside sealed heat exchange coils, with no direct contact with external air or spray water, eliminating impurity intrusion and evaporation loss. This structure maintains high cleanliness of the circulating fluid, reduces risks of scaling and corrosion, and is especially suitable for precision production equipment such as CNC spindles and hydraulic systems. It also extends the service life of core production equipment and cuts maintenance costs.

Spray water is evenly distributed on the outer wall of coils to form a complete water film. It absorbs heat from tube walls and removes massive thermal energy through the latent heat of vaporization. This mode delivers much higher heat exchange efficiency and lower energy consumption than conventional air cooling. Unevaporated water flows back to the sump for recycling, ensuring stable long-term performance for high-load industrial heat dissipation.

Integrating advantages of both cross-flow and counter-flow structures, air first flows horizontally across the lower coil section for preliminary heat exchange, then rises upward to form counter-current convection with falling spray water for deep heat transfer. This design retains the high efficiency of counter-flow heat exchange while reducing overall ventilation resistance and fan power consumption, balancing performance and operating economy.

Equipped with a high-efficiency drift eliminator at the tower top and honeycomb inward-inclined air intake grilles, the equipment greatly reduces water droplet entrainment and drift loss. It cuts down makeup water costs, prevents corrosion to surrounding facilities, and improves the on-site operating environment, making it suitable for compact factory layouts.